The 'Idol' finalists tackle the songs of John Lennon and Paul McCartney. / AP file photo

by Robert Bianco, USA TODAY

by Robert Bianco, USA TODAY

With the contestants set to perform songs by John Lennon and Paul McCartney, we have notes for two of the show's judges. As pleasant as it is to spend time with Keith Urban, who has quickly established himself as one of the medium's most likable personalities, let's hope he remembers that Lennon and McCartney actually are artists. None of the contestants have earned that title yet, and bestowing it on them before they earn it is an insult to the songwriters the show is supposed to be saluting. As for you, Nicki Minaj, you are the best judge working today - when you're working. Be. On. Time. Really. You do not want to make Mariah Carey look like the responsible one.

Supernatural | CW, 9 ET/PT

Guess who's back, Supernatural fans? Castiel (Misha Collins), who pops back into Sam's and Dean's lives to help them beat Crowley (Mark Sheppard) in the race to Lucifer's Crypt. No doubt along the way, he'll explain why Lucifer has a crypt, as you wouldn't think Satan would have any pressing need for a burial place. Then again, when it comes to Lucifer's habits and possessions, who are we to argue with an angel?

Chicago Fire | NBC, 10 ET/PT

In a season where not much is working for NBC, you have to give some credit to the largely critically ignored Chicago Fire for at least keeping the lights on for the network. Tonight, Treat Williams continues his run as Severide's father, Bennie, who clashes with Mills over a fatal fire.